What are nets for?

[Piotr]

@Witchdoc59

I think I did get all the nets sorted but I still don’t understand them.

Net = set of element pins/pads that are connected together.

@paulvdh

to read a few books and get information about EMC compatibility (yeah that’s double) from other sources.

You can read articles I have linked at forum long ago:

Decoupling capacitor via placement

I didn’t read that book but I suppose you can replace it with: I think it is enough for most pcb designers.

Decoupling capacitor via placement

About 2004 I found an interesting serie of EMC articles by Keith Armstrong (for many years I didn’t know if Keith is a woman or men name). Later they became no accessible, but when I tried to find them few years ago I found them once more: http://www.compliance-club.com/pdf/DesignTechniquesPart1.pdf http://www.compliance-club.com/pdf/DesignTechniquesPart2.pdf http://www.compliance-club.com/pdf/DesignTechniquesPart3.pdf http://www.compliance-club.com/pdf/DesignTechniquesPart4.pdf http://www…